Musannaf Ibn Abi Shayba 9:763

16666. Marwan bin Mu'awiyah narrated to us, from al-Zibriqan, from Abu Razin, he said: I heard him say: "So come to your cultivation when or how you wish" (2:223). He said: From the direction of purity, and do not come to them from the direction of menstruation.